Kondo-attractive-Hubbard model for the ordering of local magnetic moments in superconductors
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/06/2009
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) We consider local magnetic moments coupled to conduction electrons with on-site attraction in order to discuss the interplay between pairing and magnetic order. We probe the ground-state properties of this model on a one-dimensional lattice through pair binding energies and several correlation functions calculated by means of density-matrix renormalization group. A phase diagram is obtained (for fixed electron density 1/3) from which we infer that coexistence between magnetic order and superconductivity is robust at the expense of a continuous distortion of the magnetic arrangement of the local moments as evidenced by a strong dependence of the characteristic wave vector k(*) on the coupling constants. This allows us to understand some trends of the coexistence, such as the influence of the rare earth on k(*), as observed experimentally in the borocarbides. |
Formato |
4 |
Identificador |
http://dx.doi.org/10.1103/PhysRevB.79.220513 Physical Review B. College Pk: Amer Physical Soc, v. 79, n. 22, p. 4, 2009. 1098-0121 http://hdl.handle.net/11449/8518 10.1103/PhysRevB.79.220513 WOS:000267699300021 WOS000267699300021.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review B |
Direitos |
closedAccess |
Palavras-Chave | #antiferromagnetic materials #binding energy #boron compounds #dysprosium compounds #ground states #holmium compounds #Hubbard model #Kondo effect #magnetic moments #nickel compounds #phase diagrams #renormalisation #spin density waves #superconducting materials #thulium compounds |
Tipo |
info:eu-repo/semantics/article |